diff --git a/src/helpers/mongoose-fa-timestamps.plugin.ts b/src/helpers/mongoose-fa-timestamps.plugin.ts
index 4241cfc..3950f5e 100644
--- a/src/helpers/mongoose-fa-timestamps.plugin.ts
+++ b/src/helpers/mongoose-fa-timestamps.plugin.ts
@@ -38,6 +38,14 @@ function toIranFaDateTimeTuple(input: Date): [string, string] {
   return [dateFa, timeFa];
 }
 
+function isMissingFaTuple(value: unknown): boolean {
+  if (value == null) return true;
+  if (!Array.isArray(value)) return false;
+  if (value.length < 2) return true;
+  const [d, t] = value;
+  return !d || !t;
+}
+
 function writeFaTimestampsOnUpdate(query: Query<any, any>): void {
   const nowFa = toIranFaDateTimeTuple(new Date());
   const update = (query.getUpdate() ?? {}) as Record<string, any>;
@@ -54,7 +62,7 @@ function writeFaTimestampsOnUpdate(query: Query<any, any>): void {
     if (!update.$setOnInsert || typeof update.$setOnInsert !== "object") {
       update.$setOnInsert = {};
     }
-    if (update.$setOnInsert.createdAtFa == null) {
+    if (isMissingFaTuple(update.$setOnInsert.createdAtFa)) {
       update.$setOnInsert.createdAtFa = nowFa;
     }
   }
@@ -78,7 +86,7 @@ export function applyIranFaTimestampPlugin(connection: Connection): void {
 
     schema.pre("save", function (next) {
       const nowFa = toIranFaDateTimeTuple(new Date());
-      if (!(this as any).createdAtFa) {
+      if (isMissingFaTuple((this as any).createdAtFa)) {
         (this as any).createdAtFa = nowFa;
       }
       (this as any).updatedAtFa = nowFa;
@@ -88,7 +96,7 @@ export function applyIranFaTimestampPlugin(connection: Connection): void {
     schema.pre("insertMany", function (next, docs: any[]) {
       const nowFa = toIranFaDateTimeTuple(new Date());
       for (const doc of docs) {
-        if (!doc.createdAtFa) doc.createdAtFa = nowFa;
+        if (isMissingFaTuple(doc.createdAtFa)) doc.createdAtFa = nowFa;
         doc.updatedAtFa = nowFa;
       }
       next();